body {
  font-family: 'Microsoft YaHei', sans-serif;
}

.mai-icon {
  background: rgb(64, 210, 177);
  color: #fff;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  text-align: center;
  line-height: 40px;
  margin-right: 20px;
}


/* 导航 */

.navbar-default {
  background-color: #fff;
  border: none;
  box-shadow: 0px 2px 8px 0px rgba(50, 50, 50, 0.25);
}

.navbar-default .navbar-brand {
  font-size: 30px;
  font-weight: bold;
  color: #40D2B1;
  height: 70px;
  line-height: 35px;
}

.navbar-default .navbar-nav>li>a {
  font-size: 16px;
  font-weight: bold;
  color: #666;
  height: 70px;
  line-height: 35px;
}

.navbar-toggle {
  margin-top: 17px;
}

.navbar-default .navbar-toggle:hover {
  border-color: #40D2B1;
  background-color: rgb(69, 210, 184);
}

.navbar-default .navbar-toggle .icon-bar {
  background-color: #1C9982;
}


/* 第一屏 */

#home {
  margin-top: 70px;
  background: url("images/home-bg.jpg");
  background-size: cover;
  color: #ffffff;
  text-align: center;
  width: 100%;
}

.lvjing {
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  padding: 90px 0;
}

#home h1 {
  font-weight: bold;
  margin-top: 0;
  margin-bottom: 25px;
}

#home p {
  font-weight: 400;
  line-height: 35px;
}

#home img {
  margin-top: 30px;
  display: inline-block;
}


/* 第二屏 */

#bbs {
  padding: 80px 0;
  text-align: center;
}

#bbs .col-md-4 {
  padding: 15px;
}

#bbs .col-md-4:hover {
  background: #f1f1f1;
  box-shadow: 1px 1px 4px #ccc;
}

#bbs a {
  color: #212121;
  text-decoration: none;
}

#bbs img {
  margin: 0 auto;
}

#bbs h3 {
  font-weight: bold;
}


/* 第三屏 */

#html5 {
  background: #f8f8f8;
}

#html5,
#bootstrap {
  padding: 80px 0;
}

#html5 h2,
#bootstrap h2 {
  font-weight: bold;
}

#html5 p,
#bootstrap p {
  line-height: 25px;
}


/* 第五屏 */

#course {
  background: #f8f8f8;
  padding: 80px 0;
  text-align: center;
}

#course h2 {
  font-weight: bold;
  padding-bottom: 60px;
}

#course .col-md-3 {
  margin-bottom: 20px;
}

.course {
  background: #ffffff;
}

#course .btn {
  background: transparent;
  border: 1px solid #40D2B1;
  border-radius: 0px;
  color: #40D2B1;
  margin-top: 20px;
  margin-bottom: 30px;
  padding: 8px 40px;
  transition: all 0.3s;
}

#course .btn:hover {
  background: #40D2B1;
  color: #fff;
}


/*app*/

#app {
  padding: 80px 0;
}

#app h2 {
  font-weight: bold;
  padding-bottom: 30px;
}

#app .btn {
  margin: 10px 0;
  background: rgb(64, 210, 177);
  border-color: rgb(64, 210, 177);
  border-radius: 0;
  padding: 6px 30px;
  transition: all 0.3s;
}

#app .btn:hover {
  background: rgb(44, 142, 120);
}


/*contact*/

#contact {
  background: url("../images/contact-bg.png") no-repeat;
  background-size: cover;
  color: #ffffff;
}

#contact h2 {
  font-weight: bold;
  margin-top: 0;
  margin-bottom: 25px;
}

#contact p {
  line-height: 25px;
  margin-bottom: 20px;
}

#contact .form-control {
  border: none;
  border-radius: 0;
  height: 50px;
  margin-bottom: 20px;
}

#contact textarea.form-control {
  height: auto;
}

#contact input[type="submit"] {
  background: #40D2B1;
  color: #fff;
  font-weight: bold;
  transition: all 0.3s;
}

#contact input[type="submit"]:hover {
  background: rgb(44, 142, 120);
}


/*footer*/

footer {
  font-weight: 400;
  text-align: center;
  padding: 20px;
}